hi,

see phd in business management is a doctoral level course and can be done after completing masters degree, however the general eligibility criteria is candidates need to pass master degree in relevant discipline from a recognized university,

however iim bangalore offer phd course of 5 years duration on below mention discipline,

Decision Sciences

Economics & Social Sciences

Entrepreneurship

Finance & Accounting

Information Systems

Marketing

Organizational Behaviour & Human Resources Management

Production & Operations Management

Public Policy

Strategy

candidates from any of the background of  masters degree or integrated 5 years masters degree holders may apply for phd course in iim bangalore.

some of the institute which offer phd in management is,

INDIAN INSTITUTE OF MANAGEMENT - [IIMA], AHMEDABAD

NIMS university

IIM KOLKATA

MDI GURGAON

IIM LUKHNOW